/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:50:08,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:50:08,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:50:08,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:50:08,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:50:08,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:50:08,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:50:08,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:50:08,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:50:08,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:50:08,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:50:08,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:50:08,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:50:08,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:50:08,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:50:08,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:50:08,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:50:08,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:50:08,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:50:08,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:50:08,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:50:08,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:50:08,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:50:08,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:50:08,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:50:08,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:50:08,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:50:08,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:50:08,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:50:08,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:50:08,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:50:08,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:50:08,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:50:08,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:50:08,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:50:08,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:50:08,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:50:08,939 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:50:08,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:50:08,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:50:08,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:50:08,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:50:08,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:50:08,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:50:08,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:50:08,943 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:50:08,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:50:08,944 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:50:08,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:50:08,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:50:08,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:50:08,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:50:08,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:50:08,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:50:08,944 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:50:08,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:50:08,945 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:50:08,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:50:08,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:50:08,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:50:08,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:50:08,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:08,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:50:08,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:50:08,946 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:50:09,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:50:09,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:50:09,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:50:09,104 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:50:09,105 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:50:09,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label40.c [2023-03-30 23:50:10,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:50:10,540 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:50:10,541 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label40.c [2023-03-30 23:50:10,579 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35cc6f8d4/240f9b6a6ef844f48f0f737ef348cb82/FLAGef1d472ab [2023-03-30 23:50:10,591 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35cc6f8d4/240f9b6a6ef844f48f0f737ef348cb82 [2023-03-30 23:50:10,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:50:10,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:50:10,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:50:10,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:50:10,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:50:10,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:50:10" (1/1) ... [2023-03-30 23:50:10,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@120f3fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:10, skipping insertion in model container [2023-03-30 23:50:10,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:50:10" (1/1) ... [2023-03-30 23:50:10,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:50:10,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:50:11,019 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label40.c[6144,6157] [2023-03-30 23:50:11,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:50:11,852 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:50:11,878 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label40.c[6144,6157] [2023-03-30 23:50:12,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:50:12,445 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:50:12,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12 WrapperNode [2023-03-30 23:50:12,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:50:12,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:50:12,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:50:12,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:50:12,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,674 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:50:12,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:50:12,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:50:12,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:50:12,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (1/1) ... [2023-03-30 23:50:12,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:50:12,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:50:12,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:50:12,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:50:12,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:50:12,806 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:50:12,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:50:12,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:50:12,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:50:12,807 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:50:12,807 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:50:12,807 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:50:12,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:50:12,807 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:50:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:50:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:50:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:50:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:50:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:50:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:50:12,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:50:12,880 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:50:12,882 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:50:18,456 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:50:18,476 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:50:18,476 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:50:18,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:18 BoogieIcfgContainer [2023-03-30 23:50:18,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:50:18,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:50:18,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:50:18,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:50:18,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:50:10" (1/3) ... [2023-03-30 23:50:18,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b18d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:18, skipping insertion in model container [2023-03-30 23:50:18,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:12" (2/3) ... [2023-03-30 23:50:18,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b18d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:18, skipping insertion in model container [2023-03-30 23:50:18,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:18" (3/3) ... [2023-03-30 23:50:18,485 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label40.c [2023-03-30 23:50:18,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:50:18,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:50:18,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:50:18,558 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9afae96, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:50:18,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:50:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 23:50:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-30 23:50:18,572 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:18,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:50:18,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:18,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -316592124, now seen corresponding path program 1 times [2023-03-30 23:50:18,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:18,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90949204] [2023-03-30 23:50:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:18,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:18,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:18,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:18,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90949204] [2023-03-30 23:50:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90949204] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:18,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:50:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484063966] [2023-03-30 23:50:18,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:18,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:50:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:18,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:50:18,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:50:19,003 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:50:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:31,857 INFO L93 Difference]: Finished difference Result 6479 states and 12300 transitions. [2023-03-30 23:50:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:50:31,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-03-30 23:50:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:31,883 INFO L225 Difference]: With dead ends: 6479 [2023-03-30 23:50:31,883 INFO L226 Difference]: Without dead ends: 4634 [2023-03-30 23:50:31,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:50:31,900 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 6107 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 11995 mSolverCounterSat, 2910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6107 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 14905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2910 IncrementalHoareTripleChecker+Valid, 11995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:31,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6107 Valid, 504 Invalid, 14905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2910 Valid, 11995 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2023-03-30 23:50:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2023-03-30 23:50:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4626. [2023-03-30 23:50:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4568 states have (on average 1.6786339754816113) internal successors, (7668), 4571 states have internal predecessors, (7668), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-03-30 23:50:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7765 transitions. [2023-03-30 23:50:32,064 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7765 transitions. Word has length 52 [2023-03-30 23:50:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:32,065 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7765 transitions. [2023-03-30 23:50:32,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:50:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7765 transitions. [2023-03-30 23:50:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-03-30 23:50:32,075 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:32,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:50:32,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:50:32,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:32,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1547481186, now seen corresponding path program 1 times [2023-03-30 23:50:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:32,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619546807] [2023-03-30 23:50:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:32,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:32,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:32,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:32,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:32,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619546807] [2023-03-30 23:50:32,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619546807] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:32,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:32,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:50:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223588854] [2023-03-30 23:50:32,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:32,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:50:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:32,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:50:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:50:32,381 INFO L87 Difference]: Start difference. First operand 4626 states and 7765 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 4 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:50:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:50,270 INFO L93 Difference]: Finished difference Result 22107 states and 38124 transitions. [2023-03-30 23:50:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:50:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 4 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 125 [2023-03-30 23:50:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:50,357 INFO L225 Difference]: With dead ends: 22107 [2023-03-30 23:50:50,357 INFO L226 Difference]: Without dead ends: 17487 [2023-03-30 23:50:50,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:50:50,379 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 11769 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 13045 mSolverCounterSat, 3900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11769 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 16945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3900 IncrementalHoareTripleChecker+Valid, 13045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:50,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11769 Valid, 781 Invalid, 16945 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3900 Valid, 13045 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2023-03-30 23:50:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17487 states. [2023-03-30 23:50:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17487 to 17464. [2023-03-30 23:50:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17464 states, 17244 states have (on average 1.4197401994896777) internal successors, (24482), 17256 states have internal predecessors, (24482), 74 states have call successors, (74), 74 states have call predecessors, (74), 145 states have return successors, (764), 133 states have call predecessors, (764), 73 states have call successors, (764) [2023-03-30 23:50:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17464 states to 17464 states and 25320 transitions. [2023-03-30 23:50:50,822 INFO L78 Accepts]: Start accepts. Automaton has 17464 states and 25320 transitions. Word has length 125 [2023-03-30 23:50:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:50,823 INFO L495 AbstractCegarLoop]: Abstraction has 17464 states and 25320 transitions. [2023-03-30 23:50:50,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 4 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:50:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 17464 states and 25320 transitions. [2023-03-30 23:50:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-03-30 23:50:50,827 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:50,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:50:50,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:50:50,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:50,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1879459355, now seen corresponding path program 1 times [2023-03-30 23:50:50,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:50,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173936024] [2023-03-30 23:50:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:51,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:51,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:51,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:51,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173936024] [2023-03-30 23:50:51,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173936024] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:51,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:51,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:50:51,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037622725] [2023-03-30 23:50:51,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:51,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:50:51,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:50:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:50:51,187 INFO L87 Difference]: Start difference. First operand 17464 states and 25320 transitions. Second operand has 7 states, 6 states have (on average 25.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:51:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:02,228 INFO L93 Difference]: Finished difference Result 52857 states and 78575 transitions. [2023-03-30 23:51:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:51:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 25.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 156 [2023-03-30 23:51:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:02,432 INFO L225 Difference]: With dead ends: 52857 [2023-03-30 23:51:02,432 INFO L226 Difference]: Without dead ends: 35399 [2023-03-30 23:51:02,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:51:02,462 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 11160 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 10957 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11160 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 12765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 10957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:02,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11160 Valid, 1123 Invalid, 12765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 10957 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2023-03-30 23:51:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35399 states. [2023-03-30 23:51:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35399 to 32520. [2023-03-30 23:51:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32520 states, 31839 states have (on average 1.2758566537893778) internal successors, (40622), 31913 states have internal predecessors, (40622), 134 states have call successors, (134), 134 states have call predecessors, (134), 546 states have return successors, (3135), 472 states have call predecessors, (3135), 133 states have call successors, (3135) [2023-03-30 23:51:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32520 states to 32520 states and 43891 transitions. [2023-03-30 23:51:03,066 INFO L78 Accepts]: Start accepts. Automaton has 32520 states and 43891 transitions. Word has length 156 [2023-03-30 23:51:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:03,067 INFO L495 AbstractCegarLoop]: Abstraction has 32520 states and 43891 transitions. [2023-03-30 23:51:03,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 25.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:51:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 32520 states and 43891 transitions. [2023-03-30 23:51:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-03-30 23:51:03,070 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:03,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:51:03,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:51:03,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:03,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1119992694, now seen corresponding path program 1 times [2023-03-30 23:51:03,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:03,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634477061] [2023-03-30 23:51:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:03,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:03,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:03,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-03-30 23:51:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:51:03,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:03,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634477061] [2023-03-30 23:51:03,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634477061] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:51:03,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867438928] [2023-03-30 23:51:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:03,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:51:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:51:03,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:51:03,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:51:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:03,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-30 23:51:03,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:51:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-30 23:51:03,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:51:03,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867438928] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:03,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:51:03,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-30 23:51:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811853365] [2023-03-30 23:51:03,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:03,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:51:03,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:03,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:51:03,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-30 23:51:03,532 INFO L87 Difference]: Start difference. First operand 32520 states and 43891 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)